A212019 - cp's OEIS frontend

A212019 Number of (w,x,y,z) with all terms in {1,...,n} and wx=2y*z.

n	a(n)
0	0
1	0
2	4
3	8
4	24
5	32
6	64
7	76
8	124
9	154
10	214
11	234
12	340
13	364
14	452
15	532
16	664
17	696
18	854
19	890
20	1086
21	1206
22	1350
23	1394
24	1692
25	1794
26	1966
27	2108
28	2396
29	2452
30	2822
31	2882
32	3212
33	3408
34	3636
35	3860
36	4360
37	4432
38	4688
39	4920
40	5470
41	5550
42	6090
43	6174
44	6642
45	7056

[0, 0, 4, 8, 24, 32, 64, 76, 124, 154, 214, 234, 340, 364, 452, 532, 664, 696, 854, 890, 1086, 1206, 1350, 1394, 1692, 1794, 1966, 2108, 2396, 2452, 2822, 2882, 3212, 3408, 3636, 3860, 4360, 4432, 4688, 4920, 5470, 5550, 6090, 6174, 6642, 7056]

cp's OEIS Frontend

A212019 Number of (w,x,y,z) with all terms in {1,...,n} and wx=2y*z.

Table of values

List of values

cp's OEIS Frontend

A212019 Number of (w,x,y,z) with all terms in {1,...,n} and w*x=2*y*z.

Table of values

List of values

A212019 Number of (w,x,y,z) with all terms in {1,...,n} and wx=2y*z.